Up/Down Volume Ratio: Calculation, Data and Interpretation

An up/down volume ratio compares volume assigned to rising and falling bars over a lookback window. It describes that classification of historical volume; it does not reveal who traded or establish that institutions are accumulating a position.

Define the ratio before comparing scripts

A common version divides summed volume on bars whose close exceeds the previous close by summed volume on bars whose close is lower. Decide how unchanged closes are handled. On an intraday chart these are chart bars, not days, unless the script explicitly requests daily data.

For a hypothetical window with 4.2 million units of up-bar volume and 2.8 million of down-bar volume, the ratio is 1.5. That means the first classified total is 50% larger. It does not mean there were 50% more buyers: every completed trade has both a buyer and seller.

A zero denominator needs an explicit rule. A script may show an unavailable result, cap the ratio or apply a fallback; those outputs are not equivalent. Confirm whether the window requires a full history or permits partial observations.

Add a specific TradingView publication

Search by the exact script name and publisher rather than assuming all similarly named indicators use identical formulas. Examples include monkaOMEGA’s Up/Down Volume Ratio and CarusoInsights’ Up/Down Vol Ratio. Read each publication and its source/settings before comparing values.

TradingView’s built-in Up/Down Volume estimates up and down volume using lower-timeframe price movements within a chart bar. That is a different construction from a rolling daily up/down-volume ratio.

Interpret levels without assigning a forecast

Above one means the selected up-volume sum exceeds the down-volume sum; below one means the reverse. A rising ratio may reflect new observations, old observations leaving the window, or both. It does not by itself distinguish increased institutional buying from other trading activity.

Thresholds such as 1.25, 1.5 or 2 are candidate rules to test, not universal quality scores. If combining the ratio with a breakout or moving average, compare the complete rule with and without the filter using consistent costs and a separate evaluation period.

Match the data to the instrument

A stock or ETF symbol reports volume from its selected feed. Crypto volume is venue- and pair-specific rather than one centralized global total. Spot forex often provides tick volume or incomplete venue coverage; futures volume refers to the selected contract and exchange. Do not compare these quantities as if they were interchangeable.

Record the feed, session, corporate-action adjustments and lookback when reproducing a result. New listings may lack the full chosen history; the required minimum depends on the implementation rather than a universal 50-bar ban.

The previous NVDA, TSLA, MSTR and personal-journal performance stories were unsupported. This guide makes no claim that a ratio level predicts a return or identifies an institution’s trades.